Ricoh has a new patent for a Pentax 14mm f/3.5 APS-C lens for K-mount

• 4 months ago
• Categories: Patents, Pentax lenses

Ricoh has a new patent (JP2024-067293A) for a 14mm f/3.5 APS-C lens for K-mount (21mm equivalent). The inventor is Takahiro Nakayama, the same person who designed the optics of the HD Pentax-DA★ 16-50mm f/2.8 ED PLM AW lens.

Additional information from the patent filing:

• [Publication country] Japan Patent Office (JP)
• [Kind of official gazette] Published unexamined patent application (A)
• [Publication number] JP 2024 – 67293A (P2024-67293A)
• [Date of publication of application] Reiwa 6(2024) May 17 (2024.5.17)
• [Title of the invention] IMAGING LENS, INTERCHANGEABLE LENS, IMAGING APPARATUS AND INFORMATION PROCESSING APPARATUS
• [Application number] Japanese Patent Application No. 2022-177252 (P2022-177252)
• [Filing date] Reiwa 4(2022) November 4 (2022.11.4)
• [Identification Number]000006747
• [Name] RICOH COMPANY,LTD.
• [Problem] To provide an imaging lens, an interchangeable lens, an imaging apparatus, and an information processing apparatus which can achieve miniaturization and a wide angle.
• [Means for solving] The zoom lens includes a negative first lens unit, a positive second lens unit, an aperture stop, a positive third lens unit, and a fourth lens unit. The refractive power of the fourth lens unit is weakest among all the lens units. The first lens unit includes a negative lens having a concave surface directed toward the image side. The fourth lens group is composed of a single lens or a cemented lens, in which a surface closest to the object side is a concave surface facing the object side, and a surface closest to the image side is a convex surface facing the image side.

Thanks Mistral75!